Endless breaker plate structure for crushers



Nov. 13, 1951 E. H, KEIPER ENDLESS BREAKER PLATE STRUCTURE FOR CRUSHERS Filed March 14, 1949 INVENTOR. Y K .5. fi'ezjver d jw/ Patented Nov. 13, 1951 UNIT -ooffice .annnassnauaxtn ATESYIBUQTUBE -FORCRUSHER'S Edwin H. Keiper, Philadelphia, 2a., .assignorgtb Pennsylvania Crusher .company,..1?h adeleh a, .te-weme e New Yak Applicatiom-Marchim, 19459,.Serial-No.81; 361' 1 I "This invention relates to roll crushersgindfparticularly to breaker plate structure for such crushers'for handling-wet and-sticky materials. Theobject of the invention --is-to provideian efficient "feeding and crushing action which will carry the material effectively through the crushing zone and cooperate with the roll to attain reduction of the material to desired size.

Further objects of the invention particularly in the form and mounting of the traveling breaker plate will appear from the following description taken in connection with the accompanying drawing showing a vertical sectional view through the machine.

In the accompanying drawing the roll crusher frame comprises side pieces 9, base plate and end piece II, the hopper 12 being mounted as shown on the frame having a slanting end portion coinciding in direction with the cross piece I3 and delivering material through the opening between the cross piece and the edge M of the opposite member of the hopper.

A roll crusher shaft l5 mounted in bearings in the side pieces 9 carries the crusher roll 16 having teeth I1, 18, and the crushed material is discharged downward through the opening in the base plate l0 and the outlet l9.

A traveling breaker plate structure 20 composed of a continuous chain having link members 2! with teeth 22 is positioned as shown to approach the periphery of the crusher roll at an angle across the feed of the material from the hopper [2, the crusher roll rotating clockwise as indicated and the breaker plate sections moving downward adjacent the roll.

The apron 20 has its breaker plates 2| of predetermined length pivoted together to form an outer endless chain which is mounted on an upper sprocket 41 of shaft 46 which may be driven, and the lower portion of the chain passes around an auxiliary endless link belt of rollers 53 running around the lower cylinder 50 on shaft 48 and the upper cylinder roller 52 on shaft 5| between the sides 9 of the frame. The shaft 48 is preferably driven as by a chain running on the sprocket at the end of the shaft. Slide plates 55 joined by web members 56 are mounted on cross bars 51 between the frame sides 9 and the crushing thrust against the apron is transmitted from the apron links 2| to the rollers 53 of the link belt and thence to the slide plates 55 so that these rollers 53 joined together in endless chain formation by links 54 move downward with the chain 20 at about one-half the speed of the outer chain and form an intermediate roller support 2 Claims. (01.224l-e223) .2 a between the-chain-andthe-slide plate 55 reducing the frictional resistance between the apron and the plate. The successive rollers :53 are-spaced apart a distance less than the length of each breaker plate --2l so that there is at leastone roller under each breaker plate and link members 54 may be provided with resilient strips yieldingly pressing their edges along the surface of the slide plates 55 to clear these surfaces of accumulated particles of crushed material.

This traveling breaker plate or apron moving downward with a lineal speed of 3' to 4' per minute, for instance, forms a retaining movable wall for the material, constantly tending to drag the material down between the roll crusher teeth and the apron moving in the same direction at a lesser speed to the crushing area. Here the teeth of the roll and the teeth of the apron cooperate to break the material, the major teeth E8 of the crusher preferably having their tips moving in the grooves separating the teeth 22 of the chain or apron.

In this manner the bottom and the side of the chamber receiving the material from the hopper l2 both move downward in the same direction along converging lines to drag the material in between them, this combination being particularly effective in handling wet and sticky materials and avoiding any arching over or packing of these materials. The discharge opening I3, 14 of the hopper I2 is large and directed downward at an angle, and the traveling apron 20 proceeds downward from the top point well above the lower lip l3 of the hopper and substantially on a level with the upper edge M of the hopper opening.

This combination of the hopper formation and the cooperating traveling surface of the roll and apron will take bauxite and other similar plastic or wet materials and subject them to effective reduction from relatively large pieces, 24 to 30", to smaller fragments such as 1 to 1 /2", the exact reduction depending, of course, upon the hardness and size of the entering pieces of the material.

The Wide hopper opening provides an extensive feed of the material to the moving surfaces of the roll and apron so as to avoid any constriction or bottle-necks, and in effect submitting the entire mass of the hopper feed to the action of the moving surfaces so that the material is compelled to follow down into the grip of the crusher action between the roll and the apron.

This is a continuation-in-part of my application, Serial No. 664,057, filed April 22, 1946, Patent No. 2,464,774, issued March 15, 1949.

I claim:

1. In a crusher the combination with a crushing rotor engaging the material during the crushing operation, of a breaker plate structure comprising breaker plates of predetermined length pivoted together to form an outer endless chain engaging said material and having a path of movement adjacent the periphery of said crushin rotor to receive the crushing thrust of said material against said rotor, a primary rotary member supporting and positively engaging and driving said endless chain at a predetermined rate, supporting means positioned within said endless chain and comprising a side plate and a secondary rotary member having a cylinder within the opposite end of said endless chain adjacent the periphery of said crushing rotor, an intermediate rotary member between said first named rotary members, and an inner endlesslink belt of roller members spaced apart less than the said length of said breaker plates and passing around said intermediate rotary member and intervening between said outer endless chain and said cylinder at their center portions and engaging the surface of said cylinder and the the second rotary member is driven to have its cylinder turn positively in the direction of movement of the outer endless chain of breaker plates.

EDWIN H. KEIPER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,539,542 Carmichael May 29, 1925 1,543,843 Gwinn June 30, 1925 1,560,049 Frickey Nov. 3, 1925 2,150,984 Near Mar. 21, 1939 2,406,842 Lupton Sept. 3, 1946 

